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** https://note.com/solder_state/n/nde97a0516f03 and https://www.youtube.com/watch?v=op_DhPr2goc ** arduino nano clone (atmega 328p), 12-bit dac (mcp4726) and small amounts of supporting hardware Microcontroller and smoothed PWM https://kassu2000.blogspot.com/2019/10/quantizer.html using a setscrew). (ShaftLength must be included on the lower 5 mm LED 5 mm | | C3, C4, C11 | 2 | 1 | Conn_01x07 | *(optional) SIP socket, 2.54 mm, 1x10 Pin socket, 2.54 mm, 1x7 | | | | | | R6, R8 | 2 Hardware/Panel/precadsr-panel/sym-lib-table | 4 .../Panel/precadsr-panel/precadsr-panel.pro | 30 .../precadsr_aux_Gerbers/precadsr-F_Mask.gbr | 266 .../precadsr_aux_Gerbers/precadsr-F_Paste.gbr | 4 .../precadsr-Edge_Cuts.gbr | 16 .../PinHeader_1x02_P2.54mm_Vertical.kicad_mod | 35 .../PCB/precadsr/ao_tht.pretty/DIN5.kicad_mod | 21 .../DIP-14_W7.62mm_Socket_LongPads.kicad_mod | 58 .../DIP-16_W7.62mm_Socket_LongPads.kicad_mod | 60.

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